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Figure 53: 24-2 Humphrey visual field showing an early inferior paracentral defect in OS........................................................ 44
Figure 54: Spectral domain OCT showing abnormal RNFL thickness inferiorly in OD,
corresponding to the early superior arcuate defect in that eye (also look Figure 52)............................................... 44
Figure 55: Scheimpflug Image showing very low ACV, shallow ACD, narrow ACA and anterior
vaulting of the lens in OD............................................................................................................................................................ 45
Figure 56: Scheimpflug Image showing increased ACV, deeper ACD and wider ACA following
removal of the lens and posterior chamber IOL implantation........................................................................................... 46
Figure 57: BFS fitting zone.............................................................................................................................................................................. 48
Figure 58: 4 Maps Selectable showing an astigmatic cornea................................................................................................................ 49
Figure 59: 4 Maps Selectable showing an astigmatic cornea................................................................................................................ 50
Figure 60: 4 Maps Selectable showing an astigmatic cornea................................................................................................................ 51
Figure 61: 4 Maps Selectable showing posterior astigmatism............................................................................................................... 52
Figure 62: 4 Maps Selectable showing a spherical cornea..................................................................................................................... 53
Figure 63: 4 Maps Selectable showing a thin spherical cornea............................................................................................................ 54
Figure 64: Show 2 Exams showing a thin cornea...................................................................................................................................... 55
Figure 65: 4 Maps Selectable showing a borderline case....................................................................................................................... 56
Figure 66: 4 Maps Selectable showing a displaced apex........................................................................................................................ 57
Figure 67: Scheimpflug image 180° showing PMD.................................................................................................................................. 58
Figure 68: Scheimpflug image 90° showing PMD..................................................................................................................................... 58
Figure 69: Corneal thickness in a case of PMD......................................................................................................................................... 58
Figure 70: 4 Maps Selectable showing an asymmetric cornea of normal topography in OD...................................................... 59
Figure 71: 4 Maps Selectable showing an asymmetric cornea with keratoconus in OS............................................................... 60
Figure 72: 4 Maps Selectable showing a form fruste keratoconus in OS with false negative topography
in the anterior curvature map.................................................................................................................................................... 61
Figure 73: Show 2 Exams showing keratoconus greater in OD than OS............................................................................................ 62
Figure 74: 4 Maps Selectable showing a case of classic keratoconus in OD.................................................................................... 63
Figure 75: The Corneal Thickness Spatial Profile (CTSP)......................................................................................................................... 64
Figure 76: Thickness profile in an ectatic and a normal eye................................................................................................................. 66
Figure 77: Show 2 Exams Topometric showing a normal thin cornea................................................................................................. 67
Figure 78: Show 2 Exams Pachymetric showing a normal thin cornea............................................................................................... 68
Figure 79: Show 2 Exams Topometric showing an ectatic cornea........................................................................................................ 68
Figure 80: Show 2 Exams Pachymetric showing an ectatic cornea...................................................................................................... 69
Figure 81: Show 2 Exams Topometric showing an asymmetric cornea............................................................................................... 70
Figure 82: Show 2 Exams Pachymetric showing an asymmetric cornea............................................................................................ 70
Figure 83: Show 2 Exams Topometric giving a false positive diagnosis of ectasia.............................................................. 71
Figure 84: Show 2 Exams Pachymetric showing a normal cornea........................................................................................................ 71
Figure 85: Scheimpflug Image showing a case of Fuchs' dystrophy in OS........................................................................................ 72
Figure 86: Show 2 Exams Pachymetric showing a case of Fuchs' dystrophy..................................................................................... 73
Figure 87: Scheimpflug image showing clear corneas in OD with no peak in the densitogram for the
endothelium..................................................................................................................................................................................... 74
Figure 88: Scheimpflug image showing clear corneas in OS with no peak in the densitogram for the
endothelium..................................................................................................................................................................................... 74
Figure 89: Show 2 Exams display showing thick corneas with abnormal corneal thickness progression
in OD and OS................................................................................................................................................................................... 74
Figure 90: HRT single report with images of the optic nerve in OD and OS.............................................................................. 75
Figure 91: Scheimpflug Image showing a hazy cornea in OD........................................................................................................ 76
Figure 92: Scheimpflug Image showing a hazy cornea in OS........................................................................................................ 76
Figure 93: Show 2 Exams Pachymetric showing an abnormal cornea in OD and OS..................................................................... 77
Figure 94: Specular microscopy in OD and OS................................................................................................................................... 78
Figure 95: HRT single initial report showing a rim configuration out of normal limits that is indicative
of a diagnosis of glaucoma......................................................................................................................................................... 78
Figure 96: Javal/Shiotz Ophthalmometer.................................................................................................................................................... 80
Figure 97: Keratometer..................................................................................................................................................................................... 81
Figure 98: Keratoscope..................................................................................................................................................................................... 82
Figure 99: Lens form comparisons................................................................................................................................................................. 82
Figure 100: Scheimpflug image........................................................................................................................................................................ 83
Figure 101: Raw elevation data........................................................................................................................................................................ 83
Figure 102: Eelevation maps based on different reference surfaces: BFS, BFE, BFTE, BFTEF.......................................................... 84
Figure 103: Elevation maps based on different diameters......................................................................................................................... 85
28 List of illustrations
203
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